Answer:
The correct answer is option D. What traits allow cats to climb trees better than dogs?
Explanation:
The event that is happened in the question is stating that cats can easily climb on the tree where is dogs are not able to climb on the tree. Scientifically we can describe this incident by asking the question that could be lead to a hypothesis.
The scientific question should be - what traits allows the cats to climb the trees better than dogs? due to it includes the difference between the climbing ability of cats and dogs.
Thus, the correct answer is option D. What traits allow cats to climb trees better than dogs?